Malaysia's leader said on Saturday communications aboard a missing jet were switched off and its course deliberately changed by someone on board before the aircraft disappeared a week ago, but stopped short of saying it had been hijacked.

Ukraine braced on Saturday for a breakaway vote in Crimea as deadly violence flared again in the ex-Soviet country's tinderbox east amid the biggest east-west showdown since the Cold War.

Finally, the TRS chief K Chandrashekhara Rao has broken his silence over possibility of an alliance with the Congress in Telangana. After saying a firm 'no' to merger with the Congress, KCR has now ruled out any alliance with the Congress in both Assembly and Lok Sabha elections to be held on April 30.

The Bharatiya Janata Party's much anticipated list of Lok Sabha candidates is expected shortly which will end the the suspense over who will contest from Varanasi - its prime ministerial candidate Narendra Modi or party veteran Murli Manohar Joshi.

The Delhi High Court has confirmed death penalty to all four convicts of the December 16 Delhi gangrape and murder case. The four were convicted in September 2013 for raping and murdering a 23-year-old paramedical student.

Give Reasons

When the ball strikes the floor,the floor hits back with the same amount of force because for every action there is an equal and opposite reaction.

2.An inflated balloon lying on the surface of the floor moves forward when pierced with a needle

When we pierce the balloon,the air is released from the balloon in the backward direction.This pushes the balloon in the forward direction with an equal amount of force.This in accordance with Newton's third law of motion.

3.It is difficult to walk on a slippery surface but easier to walk on rough surface.

On a slippery surface friction is reduced as a result reaction force is very less and an individual is unable to walk.On a hard surface action is related to reaction and it is easier to walk.

4. A gun recoils after firing a bullet

When a gun is fired it exerts a forward force on the bullet.The bullet exerts an equal and opposite reaction force on the gun.This results in the recoil of the gun.